Means for reducing vibration of centrifugals



Nov. 20 1923.

G. R. FARR MEANS FOR REDUCING VIBRATION OF CENTRIFUGALS Filed Aug. 231921 m Vii/V TOR A TYURNL Y Patented Nov. 20, 1923.

Parent GEORGE R. FARR, OF WEST ORANGE, NEW JERSEY.

MEANS FOR REDI'l'CING VIBRATION OF CENTRIFUGALS.

Application filed August 23, 1921. Serial No. 494,588.

To allwhomz't ma concem:

Be it known t at I, GEORGE R. PARR, a citizen of the United States,residing at 3 Ridgefield Avenue, West Orange, New Jersey, have inventednew and useful Improvements in Means for Reducing Vibration of Centrials, of which the following is a specification.

My invention relates to means for reduc ing the vibration ofcentrifugals, and particularly to means for reducing the vibration of acentrifugal drying drum in a clothes washing machine.

One of the objects of my invention is to provide a vibration reducinmechanism which can be cheaply and rea ily manufactured and applied toexisting machines or can be built as a part of the machine when themachine is being constructed, and which can be easily replaced orrepaired.

With the above and other objects in viewmy invention consists in theparts, improvements and combinations more fully pointed out hereinafter.

Turningnow to the drawings:

Fig. 1 is a front elevation partly in section, showing one embodiment ofmy invention applied to the centrifugal dryer .of a clothes washingmachine of any desired t e; V

Fig. 2 is a sectional detail of the device;

Fig. 3 is a plan view of the structure shown in Fig. 2; and

Fig. 4: shows another embodiment of the invention.

The clothes washing machine shown in Fig. 1 has the frame 1 upon which astationary tub or container 2 is mounted and in which a centrifugaldrying drum 3 1s located, all as usual.

In the form of the washing machine shown in Fig. 1, the centrifugaldryini drum which is perforated, is provided wlt means for rotating it,which may consist of an electric motor 4, belt 5, pulleys 6 and 7, thelat ter being mounted in a bracket 8 and driving the shaft 9 of thecentrifugal drymg drum thru friction disks 10 and 11. These disks drivethe drum at aspeed dependmg on their position with relatlon to eachother. A treadle 12, lever 13 is connected to the shaft 9 by aconnection 14:. By pressing upon the pedal the drum is whlrled, thewater escapes thru the perforations 1n the drum and the clothes aredried. The above ma chine is one of a number of well know forms incommon use. When such a drum is loaded with clothes to be dried, itfrequently happens that the uneven distribution of the load throws thedrum out of balance so that when vide a plurality of rollers or shoeswhich are 5 independently mounted and which may be placed so as to.cooperate with the inner surface of the drum and which are soconstructed that they will check the vibration or reduceits-development. These rollers are carried by a non-rotating part of themachine, as for example, by the casing. This casing may be thestationary tub or the cover.

As illustrated in Fig. 1, I secure to the frame of the machine andpreferably to the outer surface of the fixed tub, a number of brackets15. I may use three or four brackets equally spaced about the fixedframe. Upon each bracket there is mounted an arm,

the distal end of which carries a roller or so with a part of the innersurface of the drum.

In the best embodiment of the invention, the roller contacts with atrack on the inner surface and in the particular form of the inventionillustrated the roller .contacts with the inner surface of the rim ofthe drum, the

rim consisting of a head or lip 18 running. around the inside of thethroat of the drum at its mouth. I make the face of the roller ulzoncaveas at 19'sothat it may hug the The hinged arm may be constructed invarious ways. In the form illustrated the arm consists of two parts 20,21, the outer part sliding on the inner and being correctly guided bythe pin and slot connection 22, 23. The spring 17 may be attached to apost 24 at one end and to the post 25 at the other, thus pulling theroller toward the track.

The hinges 26 of the arms are arranged horizontally so that the arms maybe thrown up and outwardly in order to disengage the roller from thetrack. When not in use the arms with the rollers will hang down as shownin Fig. 1. The cover 27 is preferably slotted at 28 to permit the arm toenter the machine. The cover is ordinarily made re. movable.

As illustrated in Fig. 4, the rollers are carried by the cover, whichforms part of the casin of the machine, and which may be hinge to theframe, or the cover may be removable and replaceable on the frame, thecover when replaced thus forming part of the casing. Each roller 29 (anumber are used equally spaced about the inside of the cover) is mountedon a two-part membenor arm: the two parts 30 and 31 having a sliding fitas shown in Fig. 1. The outer part 31 is secured to the cover 32 whichmay be hinged at 33. A spring 34 pulls the roller 29 toward the rim ofthe cover. The roller 29 is concaved at 34 and rounded oil at 35. Theconcave fits the ring and the rounded portion enables the rollers toslip over the rim when the cover is lowered down upon the machine. Theman hole 36 permits one to adjust the rollers into contact with the rim.if desired.

Having thus described the invention. its operation will be clear. Aftertaking off or raising the cover, loading and if necessary raising thecentrifugal drum, but before starting it in rotation. the hinged armswith their rollers, in the form shown in Fig. 1, are turned inwardly ofthe machine and the rollers brought into contact with the inner face ofthe rim of the drum. Or in the form shown in Fig. 4, the cover carryingthe rollers is lowered upon the machine,

and the rollers snap in place. The drum is then rotated. The vibrationis checked by the rollers which tend to centralize the drum. If thedrum} has a tendency to oscillate toward one side, the rollers willbring it back toward central position or prevent the action. A luralityof rollers equally spaced about the rum are used.

What I claim as new and desire to secure by Letters Patent is:

1. The combination of a rotating cylindrical drum, of means for reducinthe vibration thereof, comprising a plurality of members spaced aboutthe drum, each mounted independently of the other, means for securingeach member to the machine and a roller carried by each member, saidroller being arranged to project within the drum and to contact with apart of the inner surface of the drum, thus reducing vibration.

2. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a plurality of members spaced aboutthe drum each mounted independently of the other, means for securingeach member to the casing of the machine and a roller carried by eachmember, said roller being arranged to project within the drum and tocontact with a. part of the inner surface of the drum, thu reducingvibration.

3. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a plurality of members spaced aboutthe drum, each mounted independently of the other, means for securingeach membertothe casing of the machine and a spring-pressed rollercarried by each member said roller being arranged to project within thedrum and to contact with a part of the inner surface of the drum, thusreducing vibration.

4. The combination of a rotatin cylindrical drum, of means for reduclngthe vibration thereof, comprising a plurality of arms spaced about thedrum, each mounted independently of the other, means for securing eacharm to the casing of the machine and a spring-pressed roller carried byeach arm, sa d roller being arranged to project within the drum and tocontact with a part of the inner surface of the drum, thus reduc-- ingvibration.

5. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a lurality of arms equally spacedabout the rum, means for pivotally securing each arm to the casing ofthe machine, each arm being independently mounted, a roller carried bythe distal end of each arm, and a spring for each roller, said rollerbeing arran ed to contact with a part of the inner su ace of the drum,thus reducing vibration.

6. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising'a plurality of arms equally spacedabout the drum, means for hinging each arm to the casing of the machine,each arm being independently hinged, a roller carried by the distal endof each arm. means permitting said rollerto move radially, and a springurging said roller outwardly, said roller being arranged to-contact withthe inner surface of the rim of the drum.

7. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a plurality of arms equally spacedabout the drum, means for h 1ng1ng each arm to the casing of themachine, each arm being independently hinged, a concave roller carriedby the distal end of each arm, means permitting said roller to moveradially upon said arm, a spring urging said roller outwardly, saidroller being arranged to contact with the inner surface of the rim ofthe drum.

8. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a plurality of arms equally spacedabout the drum, means emme for hinging each arm to the frame of themachine, each arm being inde endently hinged, said hinges being arrangehorizontally so as to permit the arms to be raised and lowered, a rollercarried by the distal end of each arm, a spring urging said rolleroutwardly, said roller being arran ed to contact with a track on theinner sur ace of the drum.

9. The combination of a rotating cylindrical drum, of means for reducingthe vibration thereof, comprising a plurality of arms equally spacedabout the drum each arm comprising two members, one sliding with respectto the other, means for hingin each arm to the frame of the machine, eac

arm being independently hinged, said hinges being arranged horizontallyso as to permit the arms to be raised and lowered, a roller carried bythe distal end of each arm, a spring urging said roller outwardly, saidroller being arranged to contact with a track on the inner surface ofthe drum.

10. The combination of a rotating cylindrical drum, of means forreducing the vibration thereof, comprising a plurality of arms spacedabout the drum, means for securing each arm to the casing of the machineand a spring-pressed roller carried by each arm, said roller beingarranged to contact with a part of the inner surface of the drum, thusreducing vibration.

In testimony whereof, I have signed my name to this specification.

GEORGE E. FARR.

